package cc.wsyw126.java.nowcoder.sword_offer;

/**
 * Created by Administrator on 2017/4/17.
 * 求1+2+3+...+n，要求不能使用乘除法、for、while、if、else、switch、case等关键字及条件判断语句（A?B:C）。
 */
public class Sum_Solution {
    public int Sum_Solution(int n) {
        int ans = n;
        boolean b = ans > 0 && ((ans += Sum_Solution(n - 1)) > 0);
        return ans;
    }

    public static void main(String[] args) {
        Sum_Solution sum_solution = new Sum_Solution();
        int i = sum_solution.Sum_Solution(5);
        System.out.println("i = " + i);
    }
}
